Voter file loaded June 5, 2026 · figures are from that file, held as a fixed record
Franklin County, Ohio has 730,453 active registered voters across 889 precincts, as of November 2026.
Party registration
Ohio doesn't register voters by party, so there's no party breakdown to show. Party lean is usually inferred from primary participation; that data is in the voter file and available inside Motion51.
Most reliable-voting precincts
| # | Precinct | Active voters | Supervoters | Supervoter % |
|---|---|---|---|---|
| 1 | WORTH 1-B | 772 | 599 | 77.59% |
| 2 | GAH 4-D | 789 | 596 | 75.54% |
| 3 | WORTH 3-B | 856 | 646 | 75.47% |
| 4 | UA 4-D | 691 | 520 | 75.25% |
| 5 | WORTH 3-A | 685 | 513 | 74.89% |
| 6 | WORTH 3-D | 691 | 517 | 74.82% |
| 7 | GRANDVIEW-B | 857 | 639 | 74.56% |
| 8 | COLS 20-A | 1,333 | 993 | 74.49% |
| 9 | UA 3-A | 754 | 560 | 74.27% |
| 10 | RIVERLEA-A | 459 | 340 | 74.07% |
Supervoters are active registered voters who cast a ballot in at least 3 of the last 4 November general elections (2018–2024). Percentages are precinct totals from the official state voter file — no individual voter information is shown. Precincts with fewer than 400 active voters are excluded.
How Franklin County voted for president
Election results are public records.
Franklin County at a glance.
Franklin County had an estimated 1,356,303 residents in July 2024, the most populous of Ohio's 88 counties, up 2.5% since the 2020 census. Of those, 1,044,702 are 18 or older, the voting-age population, and 13.7% are 65 or older. Its 730,453 active registered voters equal about 69.9% of that voting-age population.
It covers 532 square miles of land (2,547 people per square mile). The largest cities and towns are Columbus (part) (905,883), Grove City (44,019), Dublin (part) (40,731), Hilliard (38,832) and Upper Arlington (36,140). The American Community Survey (2020-2024) puts it at a median age of 34.8, a median household income of $75,176, 42.1% of adults 25 and older holding a bachelor's degree or higher and 52.8% of occupied homes owned by the people living in them.
In 2024, 597,530 votes were cast for president, about 57.2% of the voting-age population; the Democratic ticket took 63.7% and the Republican ticket 35.3%. The two-party margin moved from D+20.7 in 2008 to D+28.4 in 2024.
- Population (2024 estimate)
- 1,356,303
- Population (2020 census base)
- 1,323,819
- Voting-age population (18+)
- 1,044,702
- Active voters per 100 adults
- 69.9
- Residents 65 and older
- 13.7%
- People per square mile
- 2,547
- Land area
- 532 sq mi
- Median age
- 34.8
- Median household income
- $75,176
- Adults 25+ with a bachelor's degree
- 42.1%
- Owner-occupied homes
- 52.8%
Largest cities and towns
- Columbus (part) 905,883
- Grove City 44,019
- Dublin (part) 40,731
- Hilliard 38,832
- Upper Arlington 36,140
Presidential vote, 2008–2024
| Year | Democratic | Republican | Margin | Votes cast |
|---|---|---|---|---|
| 2024 | 63.7% | 35.3% | D+28.4 | 597,530 |
| 2020 | 64.9% | 33.5% | D+31.4 | 630,577 |
| 2016 | 60.6% | 34.7% | D+25.9 | 554,711 |
| 2012 | 60.1% | 38.4% | D+21.7 | 541,751 |
| 2008 | 59.7% | 39.0% | D+20.7 | 560,325 |
Sources: U.S. Census Bureau Vintage 2024 population estimates and 2024 Gazetteer; American Community Survey 2020–2024 5-year estimates; certified county presidential returns. Growth, density and turnout are simple arithmetic on those figures.
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